40506131 has 4 divisors (see below), whose sum is σ = 40561392. Its totient is φ = 40450872.

The previous prime is 40506101. The next prime is 40506143. The reversal of 40506131 is 13160504.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40506131 - 2¹⁰ = 40505107 is a prime.

It is a super-2 number, since 2×40506131² = 3281493297178322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40506101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26516 + ... + 28001.

It is an arithmetic number, because the mean of its divisors is an integer number (10140348).

Almost surely, 2^40506131 is an apocalyptic number.

40506131 is a deficient number, since it is larger than the sum of its proper divisors (55261).

40506131 is an equidigital number, since it uses as much as digits as its factorization.

40506131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55260.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 40506131 is about 6364.4427093030. The cubic root of 40506131 is about 343.4316008868.

Adding to 40506131 its reverse (13160504), we get a palindrome (53666635).

The spelling of 40506131 in words is "forty million, five hundred six thousand, one hundred thirty-one".